C++ New函数代码示例

void CFLTKEditor::Load()
{
/*
	if (!CheckSave())
		return;
*/

	char pcFilename[512];

	pcFilename[0] = 0;
	Fl_File_Chooser::sort = fl_casenumericsort;
	char *pcNewFile = fl_file_chooser(m_sFileChooserLoadTitle.c_str(), 
							m_sFileChooserPattern.c_str(), pcFilename);

	if (pcNewFile != NULL) 
	{
		int i, iCount = m_mEditorData.Count();
		// Check whether file has already been loaded
		for (i = 0; i < iCount; i++)
		{
			if (pcNewFile == m_mEditorData[i].m_sFilename)
			{
				// if file is found, select it
				SetCurEditor(i);
				break;
			}
		}

		// if file has not been loaded then do load it.
		if (i == iCount)
		{
			New();
			LoadFile(pcNewFile);
		}

		UpdateFileList();
	}
}

SharedSurface*
SurfaceStream_SingleBuffer::SwapProducer(SurfaceFactory* factory,
                                         const gfxIntSize& size)
{
    MutexAutoLock lock(mMutex);
    if (mConsumer) {
        Recycle(factory, mConsumer);
    }

    if (mProducer) {
        // Fence now, before we start (maybe) juggling Prod around.
        mProducer->Fence();

        // Size mismatch means we need to squirrel the current Prod
        // into Cons, and leave Prod empty, so it gets a new surface below.
        bool needsNewBuffer = mProducer->Size() != size;

        // Even if we're the right size, if the type has changed, and we don't
        // need to preserve, we should switch out for (presumedly) better perf.
        if (mProducer->Type() != factory->Type() &&
            !factory->Caps().preserve)
        {
            needsNewBuffer = true;
        }

        if (needsNewBuffer) {
            Move(mProducer, mConsumer);
        }
    }

    // The old Prod (if there every was one) was invalid,
    // so we need a new one.
    if (!mProducer) {
        New(factory, size, mProducer);
    }

    return mProducer;
}

extern	int
ConnectTerm(
	int		_fhTerm)
{
	int				fhTerm;
	pthread_t		thr;
	pthread_attr_t	attr;
	TermNode		*term;

ENTER_FUNC;
	pthread_attr_init(&attr);
	pthread_attr_setstacksize(&attr,256*1024);
	if ((fhTerm = accept(_fhTerm,0,0)) < 0) {
		Error("accept(2) failure:%s",strerror(errno));
	}
	term = New(TermNode);
	term->que = NewQueue();
	term->fp = SocketToNet(fhTerm);
	pthread_create(&thr,&attr,(void *(*)(void *))TermThread,(void *)term);
	pthread_detach(thr);
LEAVE_FUNC;
	return	(fhTerm); 
}

SharedSurface*
SurfaceStream_TripleBuffer::SwapProducer(SurfaceFactory* factory,
                                         const gfx::IntSize& size)
{
    PROFILER_LABEL("SurfaceStream_TripleBuffer", "SwapProducer");

    MonitorAutoLock lock(mMonitor);
    if (mProducer) {
        RecycleScraps(factory);

        if (mStaging)
            Scrap(mStaging);

        MOZ_ASSERT(!mStaging);
        Move(mProducer, mStaging);
        mStaging->Fence();
    }

    MOZ_ASSERT(!mProducer);
    New(factory, size, mProducer);

    return mProducer;
}

/* Append speaker accumulate structure list */
SpkrAccListItem *AppendSpkrAccList(SpkrAccListItem *sal, SpkrAcc *sa)
{
   SpkrAccListItem *temp;
   int i;

   temp = New(&gstack,sizeof(SpkrAccListItem));
   temp->sa = InitSpkrAcc();
   for (i=1;i<=vSize;i++){
      temp->sa->meanSum[i] = sa->meanSum[i];
      temp->sa->squareSum[i] = sa->squareSum[i];
   }
   temp->sa->NumFrame = sa->NumFrame;
   strcpy(temp->sa->SpkrName,sa->SpkrName);
   temp->nextSpkr = sal;
   sal = temp;
  
   if (trace&T_CMV){
      fprintf(stdout,"Creating entry for speaker %s ......\n",sa->SpkrName);
      fflush(stdout);
   }

   return sal;
}

/*
 * Store a directory name at specified address in an alist.
 * Note, we do shell expansion except if the string begins
 * with a vertical bar (i.e. it will likely be passed to the
 * shell later).
 */
void store_alist_dir(LEX *lc, RES_ITEM *item, int index, int pass)
{
   alist *list;

   if (pass == 2) {
      if (*(item->value) == NULL) {
         list = New(alist(10, owned_by_alist));
      } else {
         list = (alist *)(*(item->value));
      }

      lex_get_token(lc, T_STRING);   /* scan next item */
      Dmsg4(900, "Append %s to alist %p size=%d %s\n",
            lc->str, list, list->size(), item->name);
      if (lc->str[0] != '|') {
         do_shell_expansion(lc->str, sizeof(lc->str));
      }
      list->append(bstrdup(lc->str));
      *(item->value) = (char *)list;
   }
   scan_to_eol(lc);
   set_bit(index, res_all.hdr.item_present);
}

void ShowStartupWizard (void)
{
   if (g.pWizard != NULL) // Already showing the wizard? Stop here.
      return;

   memset (&l, 0x00, sizeof(l));

   g.pWizard = New(WIZARD);

   g.pWizard->SetDialogTemplate (IDD_WIZARD, IDC_LHS, IDC_RHS, IDBACK, IDNEXT);
   g.pWizard->SetGraphic (IDB_WIZ16, IDB_WIZ256);
   g.pWizard->SetStates (aStates, cStates);
   g.pWizard->SetState (STEP_START);

   g.pWizard->Show();

   Delete(g.pWizard);
   g.pWizard = NULL;

   Main_RepopulateTabs (TRUE);

   FreeDriveMapList (&l.List);
}

/* EXPORT->CreateHButton: create a button object with the specified parameters */
HButton *CreateHButton(HButton *btnlst, ButtonId btnid, int x, int y, int w, 
                       int h, char *str, HColour fg, HColour bg, void (*action)(void))
{
   HButton *btn, *btnptr;
   
   btn = New(&btnHeap, sizeof(HButton));
   /* initialise the fields of the structure */
   btn->id = btnid;
   btn->x = x;   btn->y = y;   btn->w = w;   btn->h = h;
   btn->str = str;
   btn->fg = fg;   btn->bg = bg;
   btn->lit = FALSE; btn->active = TRUE; btn->toggle = FALSE;
   btn->next = NULL;
   /* append it to the end of the list if the list already exists */
   if (btnlst!=NULL){
      btnptr = btnlst;
      while (btnptr->next != NULL) btnptr = btnptr->next;
      btnptr->next = btn;
   }
   btn->action = action;
   /* return ptr to the newly created button */
   return btn;
}

static void Audio_mixer (void* udata, Uint8* buf, int size)
{
	(void)udata;
	Zero(buf, size, Uint8);
	if (!_audio.buf) {
		_audio.buf = New(size, Uint8);
		_audio.spec.samples = size;
	}

	MusicResource* music = _audio.music;
	SmackerResource* smacker = SDL_AtomicGetPtr((void**)&_audio.smacker);

	if (music) {
		MusicResource_play(music, _audio.buf, size);

		SDL_MixAudioFormat(buf, _audio.buf, AUDIO_S16LSB, size, _audio.volume);
	}
	if (smacker) {
		SmackerResource_play_audio(smacker, _audio.buf, size);

		SDL_MixAudioFormat(buf, _audio.buf, AUDIO_S16LSB, size, _audio.volume);
	}
}

void AddArcTrans(MemHeap *mem,  HArc *start, HArc *end, float lmlike){
   /*Adds a transition with probability "lmlike" scaled by "lmScale".  The reason those two are given separately
     (instead of their product) is that it makes a difference when two transitions are added. */

   ArcTrans *at;

   at = (ArcTrans*)New(mem, sizeof(ArcTrans));
   at->start = start;
   at->end = end;
   at->lmlike = lmlike;
   if (isnan(lmlike)) HError(1, "lmlike isnan..");
   /*insert it into the ll attached to start->follTrans.*/
   at->start_foll = start->follTrans;
   if(start->follTrans) start->follTrans->start_prec = at;
   start->follTrans=at;
   at->start_prec = NULL;
    
   /*insert it into the ll attached to end->precTrans.*/
   at->end_foll = end->precTrans;
   if(end->precTrans) end->precTrans->end_prec = at;
   end->precTrans=at;
   at->end_prec = NULL;
}

void Exercise4()
{
	Player_Struct Players[5];
	
	int i;
	for (i = 0; i < 5; i++)
	{
		Ask(Players[i]);
		if (i < 4)
			std::cout << "-----------------------" << std::endl;
	}
	for (i = 0; i < 5; i++)
	{
		Tell(Players[i]);

		if (i < 4)
			std::cout << std::endl << "-----------------------";
	}

	End();
	New("5");
	Exercise5(Players);
}

int cdecl vMessage (UINT type, LONG title, LONG text, LPCTSTR fmt, va_list arg)
{
   LPMESSAGE_PARAMS pmp = New(MESSAGE_PARAMS);

   pmp->dwType = type;

   if ((pmp->pszTitle = FormatString (title, fmt, arg)) == NULL)
      {
      Delete(pmp);
      return IDCANCEL;
      }

   if ((pmp->pszText = vFormatString (text, fmt, arg)) == NULL)
      {
      FreeString (pmp->pszTitle);
      Delete(pmp);
      return IDCANCEL;
      }

   if (!( pmp->dwType & 0xF0 )) // no icon requested?  pick one.
      {
      pmp->dwType |= ((pmp->dwType & 0x0F) ? MB_ICONQUESTION : MB_ICONASTERISK);
      }

   if (pmp->dwType & MB_MODELESS)
      {
      pmp->dwType &= ~MB_MODELESS;

      HANDLE hThread;
      if ((hThread = CreateThread (NULL, 0, (LPTHREAD_START_ROUTINE)Message_ThreadProc, pmp, 0, NULL)) != NULL)
         SetThreadPriority (hThread, THREAD_PRIORITY_BELOW_NORMAL);

      return -1; // threaded--who knows what button was hit.
      }

   return Message_ThreadProc (pmp);
}

int main(int argc, char *argv[])
{
   char plugin_dir[1000];
   bpContext ctx;
   bEvent event;
   Plugin *plugin;
    
   b_plugin_list = New(alist(10, not_owned_by_alist));

   ctx.bContext = NULL;
   ctx.pContext = NULL;
   getcwd(plugin_dir, sizeof(plugin_dir)-1);

   load_plugins((void *)&bfuncs, plugin_dir, plugin_type);

   foreach_alist(plugin, b_plugin_list) {
      printf("bacula: plugin_size=%d plugin_version=%d\n", 
              pref(plugin)->size, pref(plugin)->interface);
      printf("License: %s\nAuthor: %s\nDate: %s\nVersion: %s\nDescription: %s\n",
         pref(plugin)->plugin_license, pref(plugin)->plugin_author, 
         pref(plugin)->plugin_date, pref(plugin)->plugin_version, 
         pref(plugin)->plugin_description);

      /* Start a new instance of the plugin */
      pref(plugin)->newPlugin(&ctx);
      event.eventType = bEventNewVolume;   
      pref(plugin)->handlePluginEvent(&ctx, &event);
      /* Free the plugin instance */
      pref(plugin)->freePlugin(&ctx);

      /* Start a new instance of the plugin */
      pref(plugin)->newPlugin(&ctx);
      event.eventType = bEventNewVolume;   
      pref(plugin)->handlePluginEvent(&ctx, &event);
      /* Free the plugin instance */
      pref(plugin)->freePlugin(&ctx);
   }

void Server_Hosts_OnAddEntry (HWND hDlg, LPSVR_HOSTS_PARAMS lpp)
{
   LPSVR_ADDHOST_PARAMS pAdd = New (SVR_ADDHOST_PARAMS);
   memset (pAdd, 0x00, sizeof(pAdd));
   pAdd->lpiServer = lpp->lpiServer;

   if (ModalDialogParam (IDD_SVR_ADDHOST, hDlg, (DLGPROC)Server_AddHost_DlgProc, (LPARAM)pAdd) == IDOK)
      {
      size_t iEntry;
      for (iEntry = 0; iEntry < lpp->lpList->cEntries; ++iEntry)
         {
         LPHOSTLISTENTRY pEntry = &lpp->lpList->aEntries[ iEntry ];
         if (pEntry->szHost[0] == TEXT('\0'))
            continue;
         if (!lstrcmpi (pEntry->szHost, pAdd->szHost))
            break;
         }

      if (iEntry >= lpp->lpList->cEntries)
         {
         iEntry = AfsClass_HostList_AddEntry (lpp->lpList, pAdd->szHost);
         }

      HWND hList = GetDlgItem (hDlg, IDC_HOST_LIST);
      FL_StartChange (hList, FALSE);

      HLISTITEM hItem;
      if ((hItem = FastList_FindItem (hList, (LPARAM)iEntry)) == NULL)
         {
         hItem = FL_AddItem (hList, 1, (LPARAM)iEntry, 0, pAdd->szHost);
         }

      FL_EndChange (hList, (LPARAM)hItem);
      }

   Delete (pAdd);
}

G2Packet* G2Packet::New(char* pSource)
{
	G2Packet* pPacket = New();

	char nInput		= *pSource++;

	char nLenLen	= ( nInput & 0xC0 ) >> 6;
	char nTypeLen	= ( nInput & 0x38 ) >> 3;
	char nFlags	= ( nInput & 0x07 );

	pPacket->m_bCompound	= ( nFlags & G2_FLAG_COMPOUND ) ? true : false;
	bool	bBigEndian	= ( nFlags & G2_FLAG_BIG_ENDIAN ) ? true : false;

	quint32 nLength = 0;

	if ( bBigEndian )
	{
		throw packet_error();
	}
	else
	{
		char* pLenOut = (char*)&nLength;
		while ( nLenLen-- ) *pLenOut++ = *pSource++;
	}

	nTypeLen++;
	char* pszType = pPacket->m_sType;
	for ( ; nTypeLen-- ;  )
	{
		*pszType++ = *pSource++;
	}
	*pszType++ = 0;

	pPacket->Write( pSource, nLength );

	return pPacket;
}